Block lag / Door delay / Pressure plate stuck

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) to this ticket.

After having this issue:

Please attach the complete output of the "Game Output (Your Minecraft name) " which can be found on the fourth tab of the launcher to this ticket.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

Does your issue still occur in 15w39c?

Confirmed for 15w39c!
May we chnage the issue's title?
"Delay when opening doors"

Screenshots:
http://imgur.com/a/gHa9Y

To Reproduce:
1. Place door down
2. Open it
3. You will notice a small delay
4. (You may have to reload the world to get the delayed effect)

Crash Report:
---- Minecraft Crash Report ----
// My bad.

Time: 9/23/15 3:38 PM
Description: Manually triggered debug crash

java.lang.Throwable
	at bab.s(SourceFile:1625)
	at bab.as(SourceFile:928)
	at bab.a(SourceFile:377)
	at net.minecraft.client.main.Main.main(SourceFile:125)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at bih.a(SourceFile:361)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bkg['MinecraftSpace'/19418, l='MpServer', x=37.05, y=73.00, z=229.99]]
	Chunk stats: MultiplayerChunkCache: 441, 441
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (32,64,232), Chunk: (at 0,4,8 in 2,14; contains blocks 32,0,224 to 47,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 2278 game time, 2278 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 115 total; [vd['Bat'/19200, l='MpServer', x=-1.46, y=14.48, z=266.94], vl['Pig'/19201, l='MpServer', x=0.19, y=78.00, z=269.69], vl['Pig'/19202, l='MpServer', x=15.94, y=79.00, z=282.03], vl['Pig'/19203, l='MpServer', x=6.63, y=78.00, z=279.13], vl['Pig'/19204, l='MpServer', x=2.19, y=78.00, z=283.31], yo['Skeleton'/19211, l='MpServer', x=17.09, y=47.00, z=215.50], xn['item.tile.mushroom'/19212, l='MpServer', x=28.88, y=63.00, z=211.13], yb['Creeper'/19213, l='MpServer', x=32.22, y=32.00, z=245.13], vd['Bat'/19214, l='MpServer', x=27.41, y=33.78, z=227.22], vd['Bat'/19215, l='MpServer', x=28.25, y=34.20, z=226.74], xn['item.tile.mushroom'/19216, l='MpServer', x=27.13, y=72.00, z=230.25], ys['Zombie'/19217, l='MpServer', x=34.38, y=27.00, z=240.97], yb['Creeper'/19218, l='MpServer', x=29.41, y=33.00, z=242.56], vd['Bat'/19219, l='MpServer', x=25.39, y=33.61, z=298.24], vd['Bat'/19231, l='MpServer', x=47.01, y=34.09, z=188.04], yb['Creeper'/19232, l='MpServer', x=42.72, y=57.00, z=194.28], xn['item.tile.flower1.dandelion'/19233, l='MpServer', x=32.06, y=64.00, z=197.50], vd['Bat'/19234, l='MpServer', x=41.64, y=30.71, z=241.41], vd['Bat'/19235, l='MpServer', x=38.93, y=30.95, z=241.35], vd['Bat'/19236, l='MpServer', x=46.56, y=29.10, z=247.16], vd['Bat'/19237, l='MpServer', x=28.24, y=33.92, z=238.49], yo['Skeleton'/19238, l='MpServer', x=46.50, y=35.00, z=290.50], yo['Skeleton'/19250, l='MpServer', x=51.50, y=36.00, z=184.50], xn['item.tile.doublePlant.paeonia'/19251, l='MpServer', x=60.19, y=77.00, z=193.31], yo['Skeleton'/19252, l='MpServer', x=68.16, y=33.00, z=223.47], yq['Spider'/19253, l='MpServer', x=55.28, y=17.09, z=237.69], vd['Bat'/19254, l='MpServer', x=56.28, y=32.56, z=222.18], ys['Zombie'/19255, l='MpServer', x=56.50, y=16.00, z=243.50], yo['Skeleton'/19256, l='MpServer', x=54.50, y=24.00, z=240.50], vd['Bat'/19258, l='MpServer', x=59.94, y=22.32, z=245.09], vg['Chicken'/19259, l='MpServer', x=60.72, y=75.00, z=271.56], yo['Skeleton'/19260, l='MpServer', x=54.88, y=31.00, z=280.50], yo['Skeleton'/19261, l='MpServer', x=57.50, y=41.00, z=274.50], yo['Skeleton'/19262, l='MpServer', x=55.50, y=41.00, z=273.50], vh['Cow'/19287, l='MpServer', x=65.28, y=73.00, z=163.44], vh['Cow'/19288, l='MpServer', x=66.53, y=73.00, z=167.19], vh['Cow'/19289, l='MpServer', x=63.91, y=71.00, z=166.97], vh['Cow'/19290, l='MpServer', x=60.50, y=73.00, z=169.63], vd['Bat'/19291, l='MpServer', x=76.67, y=37.32, z=196.18], yo['Skeleton'/19292, l='MpServer', x=76.91, y=29.00, z=284.53], vg['Chicken'/19293, l='MpServer', x=62.66, y=68.00, z=268.34], vg['Chicken'/19294, l='MpServer', x=68.88, y=70.00, z=271.66], vd['Bat'/19296, l='MpServer', x=90.75, y=57.10, z=164.59], xn['item.tile.doublePlant.rose'/19297, l='MpServer', x=89.34, y=82.00, z=172.13], vh['Cow'/19298, l='MpServer', x=87.50, y=82.00, z=197.50], vh['Cow'/19299, l='MpServer', x=83.84, y=81.00, z=207.06], vh['Cow'/19300, l='MpServer', x=86.50, y=82.00, z=199.50], vh['Cow'/19301, l='MpServer', x=86.50, y=82.00, z=199.50], xn['item.tile.doublePlant.syringa'/19302, l='MpServer', x=86.13, y=72.00, z=244.78], yo['Skeleton'/19303, l='MpServer', x=87.50, y=17.00, z=264.50], yb['Creeper'/19304, l='MpServer', x=95.13, y=20.00, z=257.47], yb['Creeper'/19305, l='MpServer', x=90.50, y=19.00, z=258.50], yb['Creeper'/19306, l='MpServer', x=81.50, y=49.00, z=265.50], vg['Chicken'/19307, l='MpServer', x=83.53, y=69.00, z=278.34], yo['Skeleton'/19312, l='MpServer', x=104.69, y=57.00, z=154.69], yo['Skeleton'/19313, l='MpServer', x=95.81, y=58.00, z=149.59], ys['Zombie'/19314, l='MpServer', x=105.69, y=58.00, z=153.69], ys['Zombie'/19315, l='MpServer', x=105.50, y=62.00, z=185.50], yq['Spider'/19316, l='MpServer', x=110.97, y=62.00, z=186.28], vh['Cow'/19317, l='MpServer', x=108.25, y=73.00, z=259.53], yo['Skeleton'/19318, l='MpServer', x=100.50, y=17.00, z=282.50], yb['Creeper'/19319, l='MpServer', x=95.28, y=11.34, z=288.69], yb['Creeper'/19320, l='MpServer', x=104.50, y=17.00, z=279.50], ys['Zombie'/19323, l='MpServer', x=117.53, y=60.00, z=184.78], vh['Cow'/19325, l='MpServer', x=112.19, y=72.00, z=260.50], vh['Cow'/19327, l='MpServer', x=112.53, y=71.00, z=262.69], yb['Creeper'/19600, l='MpServer', x=64.50, y=32.00, z=182.50], ys['Zombie'/19611, l='MpServer', x=-24.50, y=30.00, z=181.50], yo['Skeleton'/19137, l='MpServer', x=-41.50, y=40.00, z=195.50], yb['Creeper'/19138, l='MpServer', x=-36.28, y=41.00, z=209.28], ys['Zombie'/19140, l='MpServer', x=-34.53, y=45.00, z=224.25], ys['Zombie'/19142, l='MpServer', x=-36.06, y=69.46, z=293.50], ys['Zombie'/19143, l='MpServer', x=-32.91, y=70.00, z=294.50], yq['Spider'/19145, l='MpServer', x=-29.72, y=41.00, z=170.28], ys['Zombie'/19146, l='MpServer', x=-20.47, y=59.00, z=169.91], vl['Pig'/19147, l='MpServer', x=-20.78, y=71.00, z=173.06], yb['Creeper'/19148, l='MpServer', x=-23.88, y=30.00, z=179.75], yo['Skeleton'/19149, l='MpServer', x=-21.84, y=30.00, z=180.44], yb['Creeper'/19150, l='MpServer', x=-28.50, y=41.00, z=177.50], vl['Pig'/19151, l='MpServer', x=-20.16, y=63.00, z=179.91], yo['Skeleton'/19153, l='MpServer', x=-29.50, y=44.00, z=194.50], yb['Creeper'/19154, l='MpServer', x=-17.38, y=64.00, z=216.50], yo['Skeleton'/19155, l='MpServer', x=-29.31, y=59.00, z=298.69], vh['Cow'/19156, l='MpServer', x=-26.66, y=76.00, z=300.59], ys['Zombie'/19157, l='MpServer', x=-31.53, y=57.00, z=308.78], bkg['MinecraftSpace'/19418, l='MpServer', x=37.05, y=73.00, z=229.99], vg['Chicken'/19167, l='MpServer', x=-13.38, y=78.00, z=155.56], vt['Wolf'/19170, l='MpServer', x=-12.34, y=72.00, z=174.31], vt['Wolf'/19171, l='MpServer', x=-5.84, y=71.00, z=181.53], vg['Chicken'/19172, l='MpServer', x=-10.22, y=63.00, z=183.50], vl['Pig'/19173, l='MpServer', x=-10.66, y=63.00, z=185.88], vg['Chicken'/19174, l='MpServer', x=-9.50, y=64.00, z=182.50], vg['Chicken'/19175, l='MpServer', x=-8.56, y=66.00, z=182.19], vg['Chicken'/19176, l='MpServer', x=-9.50, y=65.00, z=180.50], vl['Pig'/19177, l='MpServer', x=-8.53, y=65.00, z=187.78], vt['Wolf'/19178, l='MpServer', x=-3.66, y=72.00, z=178.28], vq['Squid'/19179, l='MpServer', x=-5.41, y=61.00, z=199.38], vq['Squid'/19180, l='MpServer', x=-4.94, y=62.41, z=206.28], vq['Squid'/19182, l='MpServer', x=-11.63, y=56.00, z=211.63], vq['Squid'/19183, l='MpServer', x=-14.59, y=59.84, z=204.00], yb['Creeper'/19184, l='MpServer', x=-10.06, y=56.00, z=233.41], yq['Spider'/19185, l='MpServer', x=-5.31, y=57.00, z=230.91], vl['Pig'/19186, l='MpServer', x=-11.50, y=86.00, z=232.50], vl['Pig'/19187, l='MpServer', x=-21.31, y=80.00, z=236.47], vl['Pig'/19188, l='MpServer', x=-8.53, y=93.00, z=240.19], vl['Pig'/19189, l='MpServer', x=-14.50, y=86.00, z=243.03], yb['Creeper'/19190, l='MpServer', x=-14.50, y=59.00, z=258.00], yb['Creeper'/19191, l='MpServer', x=-2.50, y=46.00, z=274.50], yb['Creeper'/19704, l='MpServer', x=4.50, y=20.00, z=265.50], vt['Wolf'/19194, l='MpServer', x=7.47, y=75.00, z=166.78], yo['Skeleton'/19195, l='MpServer', x=4.50, y=58.00, z=236.50], yq['Spider'/19196, l='MpServer', x=-0.31, y=59.09, z=225.69], ys['Zombie'/19197, l='MpServer', x=0.03, y=57.00, z=241.56], ys['Zombie'/19198, l='MpServer', x=2.50, y=18.00, z=265.50], ys['Zombie'/19199, l='MpServer', x=4.06, y=20.00, z=264.47]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bih.a(SourceFile:361)
	at bab.b(SourceFile:2369)
	at bab.a(SourceFile:386)
	at net.minecraft.client.main.Main.main(SourceFile:125)

-- System Details --
Details:
	Minecraft Version: 15w39c
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 310438008 bytes (296 MB) / 535736320 bytes (510 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 15w39c
	LWJGL: 2.9.4
	OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.4101, Intel
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: Yes
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: Faithful 32x32 (incompatible), MCSpace and Zesty
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	CPU: 8x Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz

This ticket is incomplete. Please review the guidelines before reporting issues.
For technical support please use the Mojang Support Center.

--- This action was performed automagically. If you believe this was done erroneously, please :light_bulb_on: raise an issue.

So. What's happening with this issue at this moment?

It's been reopened.

Confirmed to pistons quickly update is delayed.

Confirmed for 15w41b

Also confirmed for Linux

Confirmed for 15w44a, they still visually glitch.

Pistons still 'flicker' in 15w44b

Also confirmed for 15w45a

Confirmed for 15w46a

Confirmed for 15w47a

Confirmed for 15w47c

Confirmed for 15w47c

This issue still occurred in the latest Minecraft version?

Ticket resolved as incomplete, because no answer in a reasonable amount of time (1+ year), if it still happens, please update the ticket.